There are some latest re-designs for the Sound menu of Gnome. But caution! I extract these from Gits and things can always change. This is just an indicator where we are today. Tomorrow is a whole different day ;)
Sound Output
Before..

After..

Devices box moves on the left and also Fade Effect and a Subwoofer meter added. Nice!
Sound Input
Before..

After..

Devices just moved on the left, also there isn’t a power off button. Maybe is just ignored from mockup.
Sound Effects
Before..

After..

Nothing much here also, just the standard left box with the alert sounds.
Sound Applications
Before..

After..

Things here remain the same apart for the power off button which is again absent. Maybe is ignored for a purpose, that I don’t know yet.
Hardware Tab also seems to missing. Maybe the move it out of Sound Widget?
